g_signal_query
g_signal_list_ids
g_signal_connect_closure
-g_signal_handler_find
g_signal_handler_block
g_signal_handler_unblock
g_signal_handler_disconnect
+g_signal_handler_find
+g_signal_handlers_block_matched
+g_signal_handlers_unblock_matched
+g_signal_handlers_disconnect_matched
g_signal_has_handler_pending
g_signal_stop_emission
g_signal_type_closure_new